1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2009 Hiroki Sato. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
19 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
23 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
25 * THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include <sys/param.h>
29 #include <sys/ioctl.h>
30 #include <sys/socket.h>
31 #include <sys/sockio.h>
32
33 #include <stdlib.h>
34 #include <unistd.h>
35
36 #include <net/ethernet.h>
37 #include <net/if.h>
38 #include <net/if_gif.h>
39 #include <net/route.h>
40
41 #include <ctype.h>
42 #include <stdio.h>
43 #include <string.h>
44 #include <stdlib.h>
45 #include <unistd.h>
46 #include <err.h>
47 #include <errno.h>
48
49 #include "ifconfig.h"
50
51 static const char *GIFBITS[] = {
52 [0] = "NOCLAMP",
53 [1] = "IGNORE_SOURCE",
54 };
55
56 static void
gif_status(if_ctx * ctx)57 gif_status(if_ctx *ctx)
58 {
59 int opts;
60 struct ifreq ifr = { .ifr_data = (caddr_t)&opts };
61
62 if (ioctl_ctx_ifr(ctx, GIFGOPTS, &ifr) == -1)
63 return;
64 if (opts == 0)
65 return;
66 printf("\toptions=%x", opts);
67 print_bits("options", &opts, 1, GIFBITS, nitems(GIFBITS));
68 putchar('\n');
69 }
70
71 static void
setgifopts(if_ctx * ctx,const char * val __unused,int d)72 setgifopts(if_ctx *ctx, const char *val __unused, int d)
73 {
74 int opts;
75 struct ifreq ifr = { .ifr_data = (caddr_t)&opts };
76
77 if (ioctl_ctx_ifr(ctx, GIFGOPTS, &ifr) == -1) {
78 warn("ioctl(GIFGOPTS)");
79 return;
80 }
81
82 if (d < 0)
83 opts &= ~(-d);
84 else
85 opts |= d;
86
87 if (ioctl_ctx(ctx, GIFSOPTS, &ifr) == -1) {
88 warn("ioctl(GIFSOPTS)");
89 return;
90 }
91 }
92
93 static struct cmd gif_cmds[] = {
94 DEF_CMD("noclamp", GIF_NOCLAMP, setgifopts),
95 DEF_CMD("-noclamp", -GIF_NOCLAMP, setgifopts),
96 DEF_CMD("ignore_source", GIF_IGNORE_SOURCE, setgifopts),
97 DEF_CMD("-ignore_source", -GIF_IGNORE_SOURCE, setgifopts),
98 };
99
100 static struct afswtch af_gif = {
101 .af_name = "af_gif",
102 .af_af = AF_UNSPEC,
103 .af_other_status = gif_status,
104 };
105
106 static __constructor void
gif_ctor(void)107 gif_ctor(void)
108 {
109 size_t i;
110
111 for (i = 0; i < nitems(gif_cmds); i++)
112 cmd_register(&gif_cmds[i]);
113 af_register(&af_gif);
114 }
115